Looking for the latest firmware version for 3.5 Enhanced Nextion
#ubitx
#nextion
What is the latest? firmware version and where can I find a copy for the 3.5 Enhanced Nextion
73 Dale ZL2COM
|
Re: What's a Reason for less Power Output ONLY get 4W on 80m?.., 3-4W on 40/20m, 1W on 15/12/10m
#ubitx
#ubitx-help
Good morning, Curt! Thank you for helping me.
?
I'm not so well trained in this area yet, I've recently upgraded my class E to class A license, but it's a real project for the first time and I'm not so experienced yet. This is really embarrassing for me and I would like to learn more, but right now I'm a little bit overwhelmed with all this.
Ok, when 8-10W output in CW was fine, i can only say the maximum ever seen was 4-5W in 80m CW on Wattmeter/Dummy Load..
The measurement of the CW power and the 45Mhz signal is such a thing, what am I supposed to do now?
Should I just do a test with a dummy load connected to the antenna socket and then measure on 80m or 40m CW and read the value with the DVM? If so, I did that.
?
But the one with the 45Mhz signal surely concerns another measurement that is printed, right?
?
And because of the audio oscillator I found a circuit diagram, but is a simple 2-tone generator with NE555 IC and I would build that, or should I do something else?
?
If it helps I could make a video of the previous measurements and then upload it with a link, but there would be good to know what exactly you would need to see to help me. I have few kinds of instruments here that are for a beginner, 100Mhz Digital Storage Oscilloscopes, Signal Generator, RCL Meter, AC Millivoltmeter, RC Generator, Lab Power Supply, and many components to build schematics for various projects.
?
Only the experience is missing.
?
|
Photo did not upload from my phone successfully, second try:
I picked up a couple of SMA-BNC jumpers at the ham fest and was playing with it yesterday afternoon - here is a photo of a PWR scan of the broadcast FM band using an HT whip as an antenna - a few strong local stations show up
73,?
Mike N2HTT
|
Morse Tutor BOM Error number
Doug pointed out that I have the wrong encoder number in the BOM for the Morse Code Tutor presented at FDIM. You definitely want the switch and the PEC11R-4020K-S0024 should do fine.
Jack, W8TEE
On Sunday, May 19, 2019, 4:38:12 PM EDT, Doug W <dougwilner@...> wrote:
Jack, I'm going through the schematic for your morse code tutor and I think you might have the wrong encoder number in your BOM.? You call out PEC11R-4020F- N0024.? The N indicates no switch.? Did you mean to list PEC11R-4020F- S0024 which has the momentary switch?? If that is the case, it is worth noting that Arrow.com does not stock the S version but they do have PEC11R-4020 K-S0024 which is the same encoder with a knurled shaft.
Doug
AC9RZ
|
Re: What's a Reason for less Power Output ONLY get 4W on 80m?.., 3-4W on 40/20m, 1W on 15/12/10m
#ubitx
#ubitx-help
OM
Very nice work on your enclosure,? and nice pictures.
The path used to do CW in the ubitx is different than CW. In summary, a signal comes from the PLL at 45 MHz to almost directly feed the transmit finals. If this can make 8 to 10 watts into a dummy load, then it says your transmit finals are fine, and the issue is in the ssb path or transmit audio.
Any short across the key connection will exercise the cw path.
An audio oscillator just needs a single tone, it can be simple. I imagine there is an example here somewhere,? otherwise email me. No unusual parts are required.
Unless one mosfet was damaged, my first guess its the transmit audio.
Curt
PS mine doesn't quite make 5w on 40m, but I enjoyed several ssb contacts. Some folk live with enough noise to cover over your signal, so keep trying others.
|
Re: Homebrew li-ion battery pack into ubitx
Cor,
I find that busting up a conversation into separate threads?
as the subject wanders makes it very difficult to follow.
Especially months later when I search for it
and find that it has bifurcated into 3 or 4 different threads.
For example, if I were to change the subject heading on this post to
"I really don't care if the discussion wanders from the thread subject line",
then someone reading your comment might never know that I responded to it.
Good luck if you want several thousand people to follow your notion
of how the forum should be organized.?
When a topic comes up that is of interest, I add a note to a text file with
an excerpt and a message number so I can easily find the discussion again.
Between that and the search facility on the groups.io website,?
I can usually find stuff without too much trouble.
Jerry
toggle quoted message
Show quoted text
On Sun, May 19, 2019 at 12:11 PM, Jerry Gaffke wrote:
None.
It's a conversation.
toggle quoted message. . .
?
On Sun, May 19, 2019 at 08:39 AM, Cor Beijersbergen wrote:
Please, what is the relation of the subject line with the contents of this message?
Cor ¨C PA4Q
|
Re: Homebrew li-ion battery pack into ubitx
None.
It's a conversation.
toggle quoted message
Show quoted text
On Sun, May 19, 2019 at 08:39 AM, Cor Beijersbergen wrote:
Please, what is the relation of the subject line with the contents of this message?
Cor ¨C PA4Q
|
Re: uBitx low signals on the speaker
Junior
In its design the ubitx in its simplicity is different than other rigs we have used.? I am only understanding part of your discussion. Your ubitx seems to be a v3, not that different than my v4 except for that audio amplifier that you replaced.
The audio IC you provided likely has more output power, but as Raj suggests more audio gain from adding a single stage transistor amplifier would allow a louder output.
If something else undesirable is happening stay alert and clarify it here.
The ubitx is intended for your modification,? be patient and enjoy it.
Curt
|
Re: upgrade firmware 0.20 to 3 or 4
hello friends....?? after some? test? ha? upgrade my? ubitx? at? cec? 0.25? ..? have? some?? work?? before? use,? because? is? not?? complete on? hardware.? want? use part of sunil?? to? complete .? tnx? to? all.? hope use? soon? my? ubitx...? best '73? from italy de in3izq danilo
|
Re: Homebrew li-ion battery pack into ubitx
Please, what is the relation of the subject line with the contents of this message? Cor ¨C PA4Q ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Sandeep Lohia
Sent: Sunday, 19 May 2019 00:14
To: [email protected]
Subject: Re: [BITX20] Homebrew li-ion battery pack into ubitx ? ? On Mon 15 Apr, 2019, 8:42 PM Jerry Gaffke via Groups.Io, <jgaffke=[email protected]> wrote: The transformer of an EFHW? matching network matches the 50 ohm transmitter
to an expected impedance into the wire of between 2500 and 3000 ohms.
Power is Volts*Amps, or Volts*(Volts/Ohms).
At 5 Watts of RF power,? ? 5watts = Volts*Volts/3000ohms,? ?therefore? Volts = sqrt(3000*5) = 122 Volts RMS.
At 100 Watts, it's still around 548 Volts RMS, not yet kilovolts
Thanks Jerry, was helpful... & here's online calculator too : Guys, any way can we know voltages approx across 20M traps ?
The polyvaricons are rated for something around 100 Volts:
? ??
Generally, you can press a polyvaricon somewhat beyond 100 Volts.
A polyvaricon works at 5 Watts for an EFHW, though?an air-variable cap would be a better choice.
If an air gap does arc over, it will self-repair once the ionized air circulates out.
And an air gap capacitor has a higher Q, and thus lower losses.
The qrpkits Sota Tuner successfully uses a polyvaricon:in an EFHW tuner:
? ??
They claim a max of 5 Watts CW, 10 Watts PEP.
On 10 Watt peaks, that would be? sqrt(3000*10) = 173 Volts RMS.
Perhaps they are more concerned about heating than they are about arcing?
Anything other than a resonant EFHW will be lower impedance,
and thus lower voltages across a tuning capacitor.
Jerry, KE7ER
On Mon, Apr 15, 2019 at 12:33 AM, Sandeep Lohia wrote:
End fed 1/2 wave is a voltage fed antenna Sarma ji, there might be more then kilo volts present even with QRP at end of coil... Therefore thin PVC variable Gang Capacitor won't help...
|
Re: treble only SSB modulation
Hi,
well I finally hooked up my headphones output to FlDigi, and that confirmed my uBitx's BFO was off, giving an audio about 300Hz too high, which I corrected successflully via the setting BFO menu (I guess my problem was different with Vaughn's one).
I will try to make some phone contact to confirm the transmit audio is actually better now, as I don't have a dummy load to avoid overloading my test receiver.
Thank's again to all of you for you great help.
73s.
--
Laurent F5FIE.
|
Re: What's a Reason for less Power Output ONLY get 4W on 80m?.., 3-4W on 40/20m, 1W on 15/12/10m
#ubitx
#ubitx-help
Hello and thank you HAMs!! This is the Ubitx of mine: 
How exactly is this meant by the audio oscillator, a 2 tone generator? I don't have one yet.
Use only the original mic cap and a zetagi m99 as second mic for testing, both have the same output power.?
?
Measure the CW power? How can there be differences, how is that meant??
The CW Key is an older model which I had on the Kennwood TS140s, so I always set the SWR for antennas. Tuner is the MFJ 948 Versa II with SWR and Watt Power Meter.?
?
The 10-11V which I read 80M in the dummy load I measure with the DVM in position DC, dummy load DL1 QRP replica of the Elecraft DL1... and my input in the Ubitx is the same at 12V on the red and brown cable. Even at 12.5V input power there is hardly any difference. The 10-11V at 80m and at 40m there are only 8-10V at the dummy load.
?
I just wanted to say I use the Ubitx 3 with FCI Sound IC and have connected a 20x4 display and installed the software from CEC 1.08. Use indoor a 12V 3A power supply(can handle up to 15V but i don't do more than 12V or maximum 12,5V for the Ubitx) and outdoor a 12V 3Ah battery from motorcycle.
?
Indoors I test with dummy load, replicated from the Elecraft DL1 QRP 20W dummy load schematic with the same components and outdoors with 80m dipole, 40m dipole, 20m delta loop, 15m dipole, 10m yagi, 40m groundplane with loaded coil and another 20m groundplan worth of 1/4 wave lenght. With 40M Groundplane with loaded and 3 radials, i have an little qso from Germany to France last Week but with 3-4 watts.. but this was the only Qso able to make because many other try but with no copy, and i look for hear me at websdr.com in half europe i select stations and try to hear me in ssb and cw, but nothing was heared, not even a cw signal heared from my self..  ?
What is meant by measuring CW? Measure the power of CW when Ubitx is on a frequency for it and with a normal Morse key. Then I read the power on the wattmeter and so I should be able to see what the right result is or how should I do it, is there an error in my method or is 4-5W on 80M and 2-3W on 40M and 20M on CW normal??
?
I have the homebrew Mic with the standart delivered Mic Cap which was in the Ubitx Box und my second Mic is a Zetagi M99 with Hall function, but on both mic the output is same.. Even many other Mic Cap i have tested with same or lower Output..
?
The main question now is which part of the Ubitx should I check and are there data for the voltage or current values of the parts to be tested which correspond to the correct value??
?
I have the idea to minimize the R63 to 22Ohm to not have to scream so close in mic to get any performance out of it, because it's really bad if I don't eat the mic very close to my mouth.
?
I had an idea to replace the Q90 transistor with a TO-92 type 2N3904 transistor and hope for an improvement of the higher watt output power. But should I do that even if the Q90 doesn't have a short circuit?
?
If I open the RV1 completely I don't have much more power than before with half to 2/3 counterclockwise. Only from 4W on, if at all, 5W are there to measure at 80M is the increase at full counterclockwise.
?
I was able to measure from 1.2A(4W) to 1.8A(5W) at this RV1 test with PTT with loud hello.
Then I tested if the other transistors in the amplifier stage have a short-circuit, but also here none was to be found, all tested in the switched off state as well as in Q90 test for short-circuit...?
?
Or should I test this for short circuits of the transistors in switched on state with device in Rx or in Tx mode?
?
What cause can it still have that instead of the normal power of the 10W like hfsignals.com also writes on their page, and also here the users except for a few who had there also problems but with other cause, only this few watts with my ubitx comes out although I have no other problems with the reception and use the 12V power supply with 3A as recommended?
?
What exactly could I do now, what exactly should I measure for you or could a video of something help, then I would do it, I just need to know what I should show then I do it immediately.
?
I want to make it somehow but I need your help, I am so thankful for every help!
|
Re: Homebrew li-ion battery pack into ubitx
Sandeep wrote:
> Guys, any way can we know voltages approx across 20M traps ?
> excited with 25 watt...
I'll assume you have a 40m dipole, with 20m traps halfway down each leg? to prevent 20m energy from passing, so it is effectively a shorter dipole on 20m. When operating on 20m, those traps are at the ends of the 20m dipole, those ends have the same 3000 ohm impedance that we would have at? the feedpoint of an end fed halfwave.? Actual impedance will vary depending on trap construction, how close the wires are cut for resonance, nearby objects,? height from ground, ...? ? But I'd expect this to be correct within a factor of two. Power is Volts*Amps, or Volts*(Volts/Ohms). 25watts = Volts * Volts / 3000ohms,? ?so Volts = square_root(25 * 3000) = 274 Volts rms of 20m RF Jerry, KE7ER
On Sat, May 18, 2019 at 03:13 PM, Sandeep Lohia wrote:
On Mon 15 Apr, 2019, 8:42 PM Jerry Gaffke via Groups.Io, <jgaffke= [email protected]> wrote: The transformer of an EFHW? matching network matches the 50 ohm transmitter
to an expected impedance into the wire of between 2500 and 3000 ohms.
Power is Volts*Amps, or Volts*(Volts/Ohms).
At 5 Watts of RF power,? ? 5watts = Volts*Volts/3000ohms,? ?therefore? Volts = sqrt(3000*5) = 122 Volts RMS.
At 100 Watts, it's still around 548 Volts RMS, not yet kilovolts
?
Thanks Jerry, was helpful...
& here's online calculator too :
?
?
Guys, any way can we know voltages approx across 20M traps ?
excited with 25 watt...
?
|
Thanks -- my goal with the uBITX was multiband ops with mini-effort and max coverage -- simplicity.? I wasn't smart enough to know what this means is you lose low SWR numbers. But then I wasn't smart enough to know that SWR below say 4 doesn't matter much on the receive end. So if you can get the big picture and understand the interaction of large numbers of errors, you realize the approach works great.? hahah
I'm sure the uBITX doesn't like high SWRs at some point, and i know there is no fold back or power reduction/protection circuity. But it seem to do just fine at 4 (or more...I'm just saying).? And yes I pay attention to the drive levels and stay within the envelope, but there is one drive setting for all bands.? I've seen WSJT-X config setting drive level per band, and I may play with that, but the uBITX takes care of itself with one drive setting for all the bands that I can use.?
Based on what I've read, the EFHW 80-10 antennas could do even better than my DIY 80-10 OCFD as they seem to have 30m out of the box. If I wanted to just by a good solution, I'd try these guys (or similar -- there are lots of vendors)
How can you beat?80/40/30/20/17/15/12/10m with no antenna tuner? Several guys in our local radio club have them, and they seem to work.
But given a easy, reliable, effective and efficient commercial solution like a EFHW-80-10, or a marginal self made mess, I will aways pick the mess.? My old boss used to say that when success is too easy, you should put obstacles in your way, just to make victory sweeter.?
|
The trouble seems to be with a pin of the dc connector. Just flow a huge blob of solder to where the picture shows. - f
I picked up a couple of SMA-BNC jumpers at the ham fest and was playing with it yesterday afternoon - here is a photo of a PWR scan of the broadcast FM band using an HT whip as an antenna - a few strong local stations show up
73,
Mike N2HTT
|
Re: uBitx low signals on the speaker
V4 has lower than desirable audio gain. Add a single stage transistor before or after volume control.
It's fine with headphones.
Raj
toggle quoted message
Show quoted text
At 19/05/2019, you wrote: Hi Junior,
Not sure exactly what you did. I have the same symptoms. I can hear signals provided the antenna tuner is spot on but there should be substantially more audio. Reading your note I am not sure exactly what you did to fix it. Any clarification will be appreciated. Thanks Jeff
|
I picked up a couple of SMA-BNC jumpers at the ham fest and was playing with it yesterday afternoon - here is a photo of a PWR scan of the broadcast FM band using an HT whip as an antenna - a few strong local stations show up
73,
Mike N2HTT
|
Re: Homebrew li-ion battery pack into ubitx
VERY GOOD.? By the? way please post SOTA TUNER CIRCUIT.? I wanted to homebrew it for my uBITX V5 QRP.? De VU2UYC, Balsun from Calicut. 73s
On Mon 15 Apr, 2019, 8:42 PM Jerry Gaffke via Groups.Io, <jgaffke= [email protected]> wrote: The transformer of an EFHW? matching network matches the 50 ohm transmitter
to an expected impedance into the wire of between 2500 and 3000 ohms.
Power is Volts*Amps, or Volts*(Volts/Ohms).
At 5 Watts of RF power,? ? 5watts = Volts*Volts/3000ohms,? ?therefore? Volts = sqrt(3000*5) = 122 Volts RMS.
At 100 Watts, it's still around 548 Volts RMS, not yet kilovolts
Thanks Jerry, was helpful... & here's online calculator too :
Guys, any way can we know voltages approx across 20M traps ? excited with 25 watt...
The polyvaricons are rated for something around 100 Volts:
? ??
Generally, you can press a polyvaricon somewhat beyond 100 Volts.
A polyvaricon works at 5 Watts for an EFHW, though?an air-variable cap would be a better choice.
If an air gap does arc over, it will self-repair once the ionized air circulates out.
And an air gap capacitor has a higher Q, and thus lower losses.
The qrpkits Sota Tuner successfully uses a polyvaricon:in an EFHW tuner:
? ??
They claim a max of 5 Watts CW, 10 Watts PEP.
On 10 Watt peaks, that would be? sqrt(3000*10) = 173 Volts RMS.
Perhaps they are more concerned about heating than they are about arcing?
Anything other than a resonant EFHW will be lower impedance,
and thus lower voltages across a tuning capacitor.
Jerry, KE7ER
On Mon, Apr 15, 2019 at 12:33 AM, Sandeep Lohia wrote:
End fed 1/2 wave is a voltage fed antenna Sarma ji, there might be more then kilo volts present even with QRP at end of coil...
Therefore thin PVC variable Gang Capacitor won't help...
|
Re: ?BITX V5 build complete (for now)
V5 uBITX FINISHED APPEARANCE EXCELLENT
Dear? OM NOKAI
Your uBITX V 5 is excellent.? Appreciate your work.
May God bless you.
73s
De VU2UYC, Balsun from Kerala, India.
Thanks for the kind words!
Faceplate is indeed sign material - Rowmark LaserMax - run through my laser cutter. Knobs are all 3D printed. Case is a CircuitSpecialists instrument enclosure (
|
Re: uBitx low signals on the speaker
Hi Junior, Not sure exactly what you did.? I have the same symptoms.? I can hear signals provided the antenna tuner is spot on but there should be substantially more audio.? Reading your note I am not sure exactly what you did to fix it.? Any clarification will be appreciated.?? Thanks Jeff
|
sdr freak
Michael Aiello
Raj vu2zap